House-jack.



I; E. PHELPS.

HOUSE JACK.

APPLICATION FILED JUNE 13 \916.

Patented Sept. 24, 1918.

2 SHEETS-SHEET 1.

witneml. E. PHELPS.

HOUSE JACK.

APPLICATION HLED JUNE l3. I916.

1,279,901 Patented Sept. 24, 1918. EETSSHEET 2.

gw ue'nioz UNITED STATES ATENT OFFICE. 1

ISAAC E. PHELPS, OF WAHOO, NEBRASKA.

HOUSE-JACK.

Application filed June 13, 1916.- Serial No. 103,462.

. same.

The invention relates to improvements in house jacks.

The object of the present invention is to improve the construction of house jacks and to provide a simple, practical, and comparatively inexpensive device designed for raising houses and various other structures and capable of enabling the raising of the same to be effected continuously and with greater rapidity andfacility.

With these and other objects in view, the invention consists in the construction and novel combination of parts hereinafter fully described, illustrated in' the accompanying drawing, and pointed out in the claims hereto appended; it being understood that various changes in the form, proportion, size and minor details of construction, within the scope of the claims, may be resorted to without departing from the spirit or sacrificing any of the advantages of the invention.

In the drawings- Figure 1 is a side elevation of a house jack constructed in accordance with this invention and shown in full lines in its initial poiition and in an elevated position in dotted mes,

Fig. 2 is a similar view the jack being elevated and the footing being placed under the jack screw for enabling the weight to be transferred from the nut to the base or foot- T ig. 3 is a vertical sectional view the cribbing being built up from that shown in Fig. 2 and the jack being arranged for a second lifting or raising operation,

Fig. 4 is a horizontal sectional view taken substantially on the line 4.4= of Fig; '2,

Fig. 5 is an enlarged vertical sectional View of the upper portion of the jack, 7

Fig. 6.is a, plan view of the nut showing the same provided with ratchet teeth, 7 Fig. 7 is a detail perspective view of the upper wedge shaped section of the foot of the ack.

Like numerals of reference designate corresponding parts in the several figures of the drawings.

In the accompanying drawings in which is illustrated the preferred embodiment of the invention, the lifting jack which is designed for elevating houses and various other structures comprises in its construction a jack screw 1 and a nut 2 which may be plain as shown or be provided with ratchet teeth 3 as illustrated in Fig. 6 of the drawings. The screw which is provided with an enlargement 4: has sockets or openings 5 for the reception of suitable means for engaging the screw to rotate the same in the usual manner. The screw is also provided at its upper and lower ends with rounded reduced terminal projections 7 and 8 constituting journals and adapted to fit in corresponding sockets or bearing recesses 9 and 10 of a cap 11 and a foot 12. The cap 11 is provided with a flat upper face and may of course be transferred from the top to the bottom of the screw when desired and the said foot 12 may of course be arranged either at the top or bottom of the device and the projections or interlocking portions 7 and 8 may be formed on either of the interlocked parts. The nut is provided with an integral flange or plate 13 which is adapted to be arranged upon cribbing 14 in a manner similar to the ordinary sectional collar block and it is adapted to obviate the necessity of employing a sectional collar block for this purpose. The cap or head 11 is placed beneath the timber 15 or other part Specification of Letters Patent. Patented Sept. 24, 1918.

to be engaged by the jack as illustrated in Fig. 1 of the drawings and the ack is operated in the usual manner to elevate the screw and the-timber 15 from the position shown in full lines in the said figure to that illustrated in dotted lines. After the screw is elevated the foot 12 is placed in position and a supplemental foot or base 16 may be employed and the foot 12 which is composed of upper and lower wedge shaped sections 17 and 18 may be tightened or the screw may be slightly reversed to change the load and shift the same from the nut to the foot of the screw. The wedge shaped upper and lower sections 17 and 18 are preferably constructed of metal and the upper sectionis provided with the said bearing socket or reper and lower wedge shaped sections 19 and 20 and these are preferably constructed of wood and may be of any desired size and are employed for cooperating with the foot.

12 when a heavy load is to be raised. The base or auxiliary foot is adapted to be supported by twoof the timbers of the cribbing and the foot 12 is supported by two of the timbers at the other two sides of the cribbing as clearly illustrated in Fig. *L of the drawings.

By this construction the weight of the load is distributed throughout the four sides of the cribbing and lower support of great strength is thereby provided for the jack screw. After the load has been shifted from the nut to the foot, the cribbing may be built up and the nut arranged at the top of the additional cribbing as illustrated in Fig. 3 of the drawings and the jack screw will then be ready for a new raise or lifting operation.

What is claimed is 1. A lifting ack comprising a, cribbing, a nut resting upon the cribbing, a jack screw threaded through and provided at its lower end with a rounded journal, at head carried by the jack screw, and a foot adapted to be placed in the cribbing below the jack screw,

said foot comprising a pair of wedge-shaped upper and lower members, the upper memher having a recess to receive the journal, as and for the purpose specified.

2. A lifting jack comprising a cribbing, a nutresting upon the cribbing, ajack screw threaded through the nut and provided at its lower end with a rounded journal, a head carried by the jackscrew, a foot adapted to be placed in the cribbing between the timbers thereof below the jack screw, said foot including two pairs of wedge-shaped members. each consisting of upper and lower members, the upper pair of wedgeshaped members being arranged at right angles to the lower' pair of wedge-shaped members, so that the lower pair of the wedge-shaped members forms an additional support for the upper wedge-shaped members, the upper wedge-shaped members being adapted to receive the lower end of the jack screw.

In testimony whereof I afiix my signature in presence of two witnesses.

ISAAC E. PHELPS. lVitnesses R. H. VVA'rsoN, H. T. LILLEY. 

